Power Manager 1.98 is supposed to fix this issue. Please give it a try and report back!
Just tried the Power Manager 1.98 on my XP/SP3 T420 (4178-6UU) and no errors so far. Thanks!
I have experienced that the process DOZESVC.exe prevents my ultrabay-hdd from undocking.
I'm quite sure that it worked a few days before w/o any problems.
After killing the process I can easily undock the HDD and put in the DVD-Multi writer.
Someone else with this problem?